US4698036A - Propeller drive for boats - Google Patents

Propeller drive for boats Download PDF

Info

Publication number
US4698036A
US4698036A US06/778,310 US77831085A US4698036A US 4698036 A US4698036 A US 4698036A US 77831085 A US77831085 A US 77831085A US 4698036 A US4698036 A US 4698036A
Authority
US
United States
Prior art keywords
drive unit
steering
propeller
drive
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/778,310
Other languages
English (en)
Inventor
Lennart H. Brandt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volvo Penta AB
Original Assignee
Volvo Penta AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volvo Penta AB filed Critical Volvo Penta AB
Application granted granted Critical
Publication of US4698036A publication Critical patent/US4698036A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/08—Means enabling movement of the position of the propulsion element, e.g. for trim, tilt or steering; Control of trim or tilt
    • B63H20/12—Means enabling steering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/32—Housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/14—Transmission between propulsion power unit and propulsion element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/32—Housings
    • B63H20/34—Housings comprising stabilising fins, foils, anticavitation plates, splash plates, or rudders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines

Definitions

  • the present invention relates to a propeller drive for boats, comprising a pair of concentric counter-rotationally driven propeller shafts in a drive housing, each of said shafts carrying at least one propeller, said drive housing being pivotable about a steering axis and having an anticavitation plate located above the propeller.
  • the purpose of the present invention is to achieve a propeller drive unit of the type described by way of introduction, which makes it possible to reduce the effect of the transverse forces on the steering torque exerted on the drive unit, so that both the shock loads during sharp turning manoeuvres and the steering forces during normal manoeuvres can be reduced to a level which permits the use of conventional cable steering even at high engine power.
  • the projected surface of the portion of the drive housing located beneath the anticavitation plate and in front of the steering axis is at least half but at most twice as large as the sum of the projected surface of the portion of the drive housing located below the anticavitation plate and behind the steering axis and the projective surface of the hubs of the propeller.
  • Oblique water flow subjects a symmetrical drive housing with arched sides to a transverse force, the pressure center of which lies on the steering axis when the surface in front of the steering axis amounts to approximately 33% of the surface behind the steering axis.
  • a non-hydraulically steered single propeller drive has a surface in front of the steering axis amounting to between 10 and 20% of the surface behind the steering axis, so that the pressure center for the flow force will be behind the steering axis.
  • designing the drive unit so that the surface in front of the steering axis is at least 50% of the surface behind the steering axis the pressure center of the flow force is moved forward to a position in front of the steering axis. The steering torque exerted by the flow force on the drive unit will thus balance the torque exerted by the propeller transverse force, thus providing a lower resultant steering torque.
  • the flow force is never lower than the propeller transverse force, which means that the surface in front of the steering axis may at most be twice as great as the surface behind the steering axis.
  • the surface behind the steering axis includes both the surface of the drive housing itself under the cavitation plate (the so-called wet surface) and the surface of the propeller hubs.
  • FIG. 1 shows a side-view in partial section of a double propeller drive unit according to the invention
  • FIG. 2 shows a schematic cross-sectional profile of the underwater housing of the drive unit.
  • the propeller drive unit shown in FIG. 1 is a so-called inboard-outboard drive unit, designed to be mounted on a boat transom and be connected to the output shaft of an engine (not shown).
  • the drive unit comprises a housing 1 and contains a reversing mechanism with an output shaft 2, which has a conical gear 3 in constant engagement with two conical gears 4 and 5.
  • the gear 4 drives a propeller shaft 6 and the gear 5 drives a hollow propeller shaft 7 mounted concentrically with the shaft 6.
  • the shaft 6 carries a propeller 8 and the shaft 7 carries a propeller 9.
  • the arrangement described results in the propeller shafts rotating in opposite directions, the rotational direction of the shaft 2 being selected so that the shaft 7 rotates counterclockwise as seen from the rear.
  • the drive housing 1 can pivot about an inclined axis S, which, as is conventional, intersects the drive joint (not shown) between the engine and the drive unit.
  • the mounting and steering mechanism of the drive are known per se and are not described in more detail here.
  • the angle between the pivot axis S and the drive shaft 2 is in the example shown here 12°.
  • the drive housing is made with an anticavitation plate 10 which extends aft over the propellers.
  • the portion of the drive housing 1 situated beneath the plane KP of the anticavitation plate is the underwater housing 11 of the drive unit.
  • the projective surface of the portion of the underwater housing beneath the plane KP and in front of the steering axis S amounts to 55% of the surface of the housing beneath the plane KP and behind the steering axis S including the projective surface of the hubs 12, 13 of the propellers 8,9.
  • the pressure center Tc of the flow force will then be slightly in front of the steering axis S.
  • This drive unit is primarily intended for diesel engines rated 150-300 HP and for speeds of over 25 knots.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Gear Transmission (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Transmission Devices (AREA)
US06/778,310 1982-09-13 1985-09-20 Propeller drive for boats Expired - Lifetime US4698036A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8205215A SE451190B (sv) 1982-09-13 1982-09-13 Propellerdrev for batar
SE8205215 1982-09-13

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06531613 Continuation 1983-09-12

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US07/095,112 Continuation US4840136A (en) 1982-09-13 1987-09-11 Propeller drive for boats

Publications (1)

Publication Number Publication Date
US4698036A true US4698036A (en) 1987-10-06

Family

ID=20347819

Family Applications (2)

Application Number Title Priority Date Filing Date
US06/778,310 Expired - Lifetime US4698036A (en) 1982-09-13 1985-09-20 Propeller drive for boats
US07/095,112 Expired - Lifetime US4840136A (en) 1982-09-13 1987-09-11 Propeller drive for boats

Family Applications After (1)

Application Number Title Priority Date Filing Date
US07/095,112 Expired - Lifetime US4840136A (en) 1982-09-13 1987-09-11 Propeller drive for boats

Country Status (9)

Country Link
US (2) US4698036A (enrdf_load_stackoverflow)
JP (1) JPS5970291A (enrdf_load_stackoverflow)
BR (1) BR8304905A (enrdf_load_stackoverflow)
CA (1) CA1215274A (enrdf_load_stackoverflow)
DE (1) DE3332833A1 (enrdf_load_stackoverflow)
FR (1) FR2532909B1 (enrdf_load_stackoverflow)
GB (1) GB2126968B (enrdf_load_stackoverflow)
IT (1) IT1170490B (enrdf_load_stackoverflow)
SE (1) SE451190B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE34011E (en) * 1985-09-17 1992-07-28 Ab Volvo Penta Propeller combination for a boat propeller unit
US5352141A (en) * 1993-05-28 1994-10-04 Brunswick Corporation Marine drive with dual propeller exhaust and lubrication
US5366398A (en) * 1992-05-27 1994-11-22 Brunswick Corporation Marine dual propeller lower bore drive assembly
US5462463A (en) * 1992-05-27 1995-10-31 Brunswick Corporation Marine dual propeller lower bore drive assembly
US5480330A (en) * 1994-10-04 1996-01-02 Outboard Marine Corporation Marine propulsion pump with two counter rotating impellers
US9630692B2 (en) 2014-09-30 2017-04-25 Ab Volvo Penta Steerable tractor-type drive for boats
US11208190B1 (en) 2020-06-23 2021-12-28 Brunswick Corporation Stern drives having breakaway lower gearcase
USD1026955S1 (en) 2020-06-23 2024-05-14 Brunswick Corporation Stern drive

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE468386B (sv) * 1991-05-15 1993-01-11 Volvo Penta Ab Baatpropellerdrev med utlopp foer avgaser
US5514014A (en) * 1993-10-04 1996-05-07 Sanshin Kogyo Kabushiki Kaisha Outboard drive transmission
JP3539573B2 (ja) * 1993-10-29 2004-07-07 ヤマハマリン株式会社 船舶推進装置
JP3470140B2 (ja) * 1993-11-29 2003-11-25 ヤマハマリン株式会社 船舶推進装置
US5697821A (en) * 1993-11-29 1997-12-16 Sanshin Kogyo Kabushiki Kaisha Bearing carrier for outboard drive
US5556313A (en) * 1993-11-29 1996-09-17 Sanshin Kogyo Kabushiki Kaisha Outboard drive transmission
US5597334A (en) * 1993-11-29 1997-01-28 Sanshin Kogyo Kabushiki Kaisha Outboard drive transmission system
US5556312A (en) * 1993-11-29 1996-09-17 Sanshin Kogyo Kabushiki Kaisha Bearing arrangement for marine transmission
JP3479941B2 (ja) * 1993-11-30 2003-12-15 ヤマハマリン株式会社 船舶推進装置
JP3413440B2 (ja) * 1994-05-31 2003-06-03 ヤマハマリン株式会社 船舶推進装置
JP3424020B2 (ja) * 1994-05-31 2003-07-07 ヤマハマリン株式会社 船舶推進装置
US6273768B1 (en) 2000-04-07 2001-08-14 Bombardier Motor Corporation Of America Water jet propulsion unit with counter-rotating impellers
US7503818B1 (en) * 2007-08-23 2009-03-17 James Hagan Propulsion system for a ship or seagoing vessel
US9067665B1 (en) 2013-12-17 2015-06-30 Caterpillar Inc. Steering fuse

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987031A (en) * 1959-07-24 1961-06-06 Conrad R Odden Dual propeller propulsion
US3404656A (en) * 1966-08-22 1968-10-08 Chamberlain Allan Hawker Inboard-outboard marine drives
US3765370A (en) * 1969-08-19 1973-10-16 Outboard Marine Corp Means for balancing the steering forces when moving in a reverse direction
US3769930A (en) * 1971-05-03 1973-11-06 L Pinkerton Inboard-outboard drive mechanism for boats
US4052952A (en) * 1975-09-04 1977-10-11 Brunswick Corporation Hydraulic powered trim and tile apparatus for marine propulsion devices
US4297097A (en) * 1978-02-23 1981-10-27 Kiekhaefer Elmer Carl Stern drive mechanism

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR32173E (fr) * 1924-12-14 1927-09-12 Dispositif de direction pour navires fluviaux et maritimes
GB314968A (en) * 1928-07-05 1930-05-22 James Hodgson Pierce Improvements in or relating to suspension devices for outboard motors
FR698378A (fr) * 1930-07-04 1931-01-30 Deutsche Werft Ag Gouvernail pour navires, en une pièce et en forme de solide de moindre résistance
GB857394A (en) * 1958-09-25 1960-12-29 Ratby Engineering Company Ltd Improvements in stern drives for boats
GB886169A (en) * 1959-01-16 1962-01-03 Murray & Tregurtha Inc Outboard propeller mechanism for boats, barges, scows and like vessels
GB1203560A (en) * 1968-04-27 1970-08-26 Kiyoshi Shima Steering and propulsion gear for ships
GB1216291A (en) * 1968-07-09 1970-12-16 Hollming Oy Improvements in tiltable propeller devices for water-going vessels
GB1324799A (en) * 1970-11-03 1973-07-25 Outboard Marine Corp Marine propulsion devices
US3934537A (en) * 1974-11-18 1976-01-27 Outboard Marine Corporation Vibration isolating mount for an outboard motor
SE433599B (sv) * 1981-03-05 1984-06-04 Volvo Penta Ab Dubbelpropellerdrev for batar
AU551195B2 (en) * 1982-02-03 1986-04-17 Volvo Penta A.B. Inboard-outboard drive

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987031A (en) * 1959-07-24 1961-06-06 Conrad R Odden Dual propeller propulsion
US3404656A (en) * 1966-08-22 1968-10-08 Chamberlain Allan Hawker Inboard-outboard marine drives
US3765370A (en) * 1969-08-19 1973-10-16 Outboard Marine Corp Means for balancing the steering forces when moving in a reverse direction
US3769930A (en) * 1971-05-03 1973-11-06 L Pinkerton Inboard-outboard drive mechanism for boats
US4052952A (en) * 1975-09-04 1977-10-11 Brunswick Corporation Hydraulic powered trim and tile apparatus for marine propulsion devices
US4297097A (en) * 1978-02-23 1981-10-27 Kiekhaefer Elmer Carl Stern drive mechanism

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE34011E (en) * 1985-09-17 1992-07-28 Ab Volvo Penta Propeller combination for a boat propeller unit
US5366398A (en) * 1992-05-27 1994-11-22 Brunswick Corporation Marine dual propeller lower bore drive assembly
US5462463A (en) * 1992-05-27 1995-10-31 Brunswick Corporation Marine dual propeller lower bore drive assembly
US5352141A (en) * 1993-05-28 1994-10-04 Brunswick Corporation Marine drive with dual propeller exhaust and lubrication
US5480330A (en) * 1994-10-04 1996-01-02 Outboard Marine Corporation Marine propulsion pump with two counter rotating impellers
US9630692B2 (en) 2014-09-30 2017-04-25 Ab Volvo Penta Steerable tractor-type drive for boats
US11208190B1 (en) 2020-06-23 2021-12-28 Brunswick Corporation Stern drives having breakaway lower gearcase
US11975812B2 (en) 2020-06-23 2024-05-07 Brunswick Corporation Stern drives having breakaway lower gearcase
USD1026955S1 (en) 2020-06-23 2024-05-14 Brunswick Corporation Stern drive

Also Published As

Publication number Publication date
IT1170490B (it) 1987-06-03
CA1215274A (en) 1986-12-16
JPS5970291A (ja) 1984-04-20
SE8205215L (sv) 1984-03-14
SE8205215D0 (sv) 1982-09-13
SE451190B (sv) 1987-09-14
IT8348967A0 (it) 1983-09-12
FR2532909A1 (fr) 1984-03-16
GB8324027D0 (en) 1983-10-12
US4840136A (en) 1989-06-20
JPH0376278B2 (enrdf_load_stackoverflow) 1991-12-04
DE3332833C2 (enrdf_load_stackoverflow) 1991-07-04
FR2532909B1 (fr) 1989-03-17
DE3332833A1 (de) 1984-03-15
GB2126968B (en) 1986-04-03
GB2126968A (en) 1984-04-04
BR8304905A (pt) 1984-04-24

Similar Documents

Publication Publication Date Title
US4698036A (en) Propeller drive for boats
US4529387A (en) Propeller drive unit for boats
JP4299968B2 (ja) 推進システム
US6705907B1 (en) Drive means in a boat
US6623320B1 (en) Drive means in a boat
CA1263825A (en) Propeller combination for a boat propeller unit
JPH0255275B2 (enrdf_load_stackoverflow)
US4810218A (en) Marine propulsion device
US4004544A (en) Twin turbine-wheel driven boat
GB2033324A (en) Improvements in or relating to drive units for water craft
JP2515864Y2 (ja) 船舶用ポッド型二重反転プロペラ
EP0640052B1 (en) Propeller drive for boats
USRE34011E (en) Propeller combination for a boat propeller unit
GB2248433A (en) Surface propeller located aft of transom by distance in the range 35% to 80% of propeller diameter
US5249994A (en) Surface-drive boat propulsion system
US3919965A (en) Boat propeller mounting and steering mechanism
WO2000058151A1 (en) Drive means in a boat
US6599159B1 (en) Drive means a boat
WO1996000682A1 (en) Propeller drive unit
CA2041244C (en) Propeller combination with non-cupped blades for a boat propeller unit
KR930008998B1 (ko) 복합 조향장치
JPH0214238B2 (enrdf_load_stackoverflow)
JPS6141697A (ja) 船舶の操舵推進機
JPH02136392A (ja) 船舶の横移動方法

Legal Events

Date Code Title Description
STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12